cmake/backports/README.md
These are modules that have been copied near 1:1 from newer CMake modules (3.15.7 at the time of writing) so that there is consistency in usage of these modules on older versions of CMake.
Unless otherwise stated, the only change has been to change include statements from file includes to module includes.
Provides an imported target from 3.14 and later
Introduced in 3.11
Provides an imported target from 3.12 and later
Provides an imported target from 3.12 and later
pkg_check_modules supports generating imported targets from 3.6 and later
Introduced in 3.12. Replaces FindPythonInterp and FindPythonLibs. Provides an imported target.
Minor changes in Support.cmake to not use VERSION_GREATER_EQUAL and to set _Python3_CMAKE_ROLE to PROJECT (as CMAKE_ROLE was only introduced with 3.14)
From 3.15 an later, provides a Python3::Module imported target for use with linking modules.